Last name Janrak (Janrak 
) , throughout the world, is a rare cognomen. The surname Janrak is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, Janrak is the forename as well as the last name.
Snit, Kotchanipha, Karntheera, Tananyapat, Kwanrutai, Nontakan, Jirapron, Panyakon, Bandidpong, Ubonwadee, Udomwit, Jirawan, Jirawat, Jintana, Ratsuda, Rattana, Attajak, Ubowadee, Jaroen, Kositr, Sanya, Sanit, Phiangphen, and Phiengphen